Malicious PDF — malware analysis report

Static analysis result for SHA-256 60893566dae14295…

MALICIOUS

PDF

81.0 KB Created: 2021-09-07 10:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8d854ca3f1b6cda66befeb01b11436df SHA-1: c6e9f9bd206a9e5063ff66151af45fdd9282f7c5 SHA-256: 60893566dae142956b60eaa36abffa8f4ea75ccbf90b5e7f91fe41d90a8abc95
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting it's used to redirect users to malicious sites. The presence of external URI links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://argol-editions.fr/userfiles/file/60420443637.pdf In PDF document text
    • http://efuturesthai.com/uploads/files/65637324838.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/4cbkos61b41ksko02ljuobn9ju/71210515895.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/nozijolopasazidosuw.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/89333355628.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/zebopijifop.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160703ae59dac2---girogolatobewidokeju.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/5khus7cj29c1ntrtr4avcer5j6/rawatozebizufegatiso.pdfIn PDF document text
    • http://africareview.in/userfiles/file/34759481656.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/1413341a80cf4b98279aa3c73c50f50e/zajedelisimisiremuferive.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/lomikitofipi.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c587059571b---45737034123.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/vopipaxezidi.pdfIn PDF document text
    • https://virker-ikke.dk/files/57505422511.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/tiliguvokosek.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/migibavorumu.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/gufonilumodun.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/1067814d3f86ff95d2ea4886a2087184/gewev.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/162434427862757376521.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a401a4bb7aa---57277716923.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/qtk622f6g25cdib75vsc9a1db4/jesumopezalegamuvep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=pather+panchali+pdf+malayalamPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD650 10712 bytes
SHA-256: 496f3bb34852576d153ae7dbd47dfc751b77b2b46acfcf5a4d7a754fc33eb66a
font_01_sfnt_off0000eeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 18356 bytes
SHA-256: a5467c73442fef66c5e00ab6d72b6c4ee85357e32590b04c8563c5e609e54e89
font_02_sfnt_off00011e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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